Insert a 100ms sleep just before sending the USR2 signal to the

child receiver process to prevent some hangs on Cygwin.  Anthony
Heading discovered the workaround first and suggested 30ms, and
Greger Cronquist had better luck with 100ms.

2 files changed, 4 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 47433c67..1cdb6867 100644
--- a/NEWS
+++ b/NEWS
@@ -75,6 +75,8 @@ rsync changes since last release
 
     * Prevent "Connection reset by peer" messages from Cygwin. (Randy O'Meara)
 
+    * Prevent some hangs at the end of a run on Cygwin. (Anthony Heading)
+
   INTERNAL:
 
     * Many code cleanups and improved internal documentation.  (Martin 
diff --git a/main.c b/main.c
index b571b3a8..53a237ca 100644
--- a/main.c
+++ b/main.c
@@ -462,6 +462,8 @@ static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
 	io_flush();
 
 	io_set_error_fd(-1);
+	/* workaround for cygwin hangs; wait to make sure child is ready */
+	msleep(100); 
 	kill(pid, SIGUSR2);
 	wait_process(pid, &status);
 	return status;